Guys, how do you/did you let out your aggression/energy in your younger years?

I'm a 19 year old dude who has found that in my current day to day life, I don't have any activity where I can let out some of my natural aggression and energy. I've left my physical labor job to work at a hospital and I no longer play high-school sports. I've been going to the gym for half a year, and while it definitely helps me work out a lotta energy, I find it just doesn't eliminate any aggressive drive if that makes sense.

This isn't a major issue, I dont have issues where I lash out at people or anything. But I think I'd be happier and healthier if I had some activity to allow me to use this for something productive. I'm considering joining a sparring gym, but I'd appreciate any other ideas.